CN101323172A - Laser plastic micro-welding method and device based on dynamic mask technique - Google Patents
Laser plastic micro-welding method and device based on dynamic mask technique Download PDFInfo
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- CN101323172A CN101323172A CNA2008101226090A CN200810122609A CN101323172A CN 101323172 A CN101323172 A CN 101323172A CN A2008101226090 A CNA2008101226090 A CN A2008101226090A CN 200810122609 A CN200810122609 A CN 200810122609A CN 101323172 A CN101323172 A CN 101323172A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1677—Laser beams making use of an absorber or impact modifier
- B29C65/1683—Laser beams making use of an absorber or impact modifier coated on the article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1696—Laser beams making use of masks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/756—Microarticles, nanoarticles
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to the field of plastic welding, in particular to a micro welding method for laser plastics and a device based on dynamic mask technology, which are suitable for the rapid welding of plastic materials, in particular for the welding of a plastic micro device. The device consists of a laser, an astigmatism system, a liquid crystal display, a computer and a focusing system. The micro welding method works in a way that a computer is used for performing accurate control over graphics shape shown on the liquid crystal display so that a leaser beam is converged by the focusing system to obtain a luminous spot with the same shape of a welding seam after getting through the liquid crystal display. The luminous spot is irradiated on a work piece to synchronously weld two kinds of plastics. The micro welding method for laser plastics feeds the dynamic mask technology into the micro transmission welding technology of the plastics, so the micro welding method for laser plastics can adapt to synchronous welding of the welding seams with different shapes, thus realizing a low-cost and large-scale welding of micro device. The micro welding device has simple technology and good consistency and is suitable for automatic production.
Description
Technical field
The present invention relates to the Plastic Welding field, refer in particular to a kind of laser plastic micro-welding method and device based on dynamic mask technique, the rapid welding that it is applicable between plastic material is particularly suitable for the welding of plastics micro element, can guarantee high efficiency, the mass production of microwelding.
Background of invention
Traditional TECHNOLOGY OF WELDING PLASTICS comprises: ultrasonic bonding, Vibration Welding, flat plate heat welding etc.The advantage of laser plastic welding is the resin less degradation, and the chip of generation is few, because laser is untouchable, can not produce pollution in welding process.Another major advantage is that the laser plastic welding is littler than vibration stress and the thermal stress that other connected modes produced, so just improved the service life of goods or device intraware greatly, so the laser plastic welding method is more suitable for being applied to flimsy electronic sensor, microfluidic device, MEMS.In the seventies in 20th century, laser begins to be applied on the Plastic Welding, because the unique advantage of laser plastic solder technology and the development of laser technology, to the nineties in 20th century, the laser plastic solder technology has obtained large-scale commercial Application.The welding of the laser plastic the earliest application that sees bibliographical information is in 1972, uses 100 watts CO
2LASER Light Source is with the speed polyethylene welding thin plate (maximum ga(u)ge is 1.5 millimeters) of 10 millimeters of per seconds.
The laser plastic welding has obtained development fast in recent years as a kind of novel TECHNOLOGY OF WELDING PLASTICS, and all there has been comparatively deep research in each research institution to method, technology, the equipment of this technology both at home and abroad.Wherein, aspect welding method, the patent No. that Switzerland Leste Processing Tech. AG delivers is the technology of CN00101924.4: the method for laser welding of welding plastic workpiece or plastics and other materials and device, on welding method, study exactly, according to precognition weld shape designing mask plate, utilize mask plate to block the part of laser beam, the shape of mask plate printing opacity is identical with the precognition weld seam, utilize through the light beam behind the mask plate at last plastics welded, but have following problem:
1. can not weld little meticulous product;
2. light source and treat to have between the weldment higher the relatively moving of speed causes the buckling deformation of working of plastics easily;
3. the mask manufacture difficulty need be made different masks at different weld seams, and cost is higher.
Summary of the invention:
The purpose of this invention is to provide a kind of laser plastic micro-welding method based on dynamic mask technique.Light path part in the design laser plastic welding system is selected to see through to laser beam, makes that the light spot shape of laser beam is identical with the weld shape of precognition, finally to-be-welded region is welded synchronously.
Said laser plastic micro-welding method based on dynamic mask technique, be: the laser beam that laser instrument sends, after astigmatic system, form large diameter collimated light beam, and shine on the LCDs, laser beam forms the hollow out figure hot spot that becomes inverse relation with the liquid crystal display screen image by behind the LCDs, the convergence formation hollow out hot spot consistent through focusing system with weld shape, see through first kind of plastics, act on place, two kinds of plastics part composition surfaces after, cooling back formation weld seam naturally.Its operation principle is to be absorbed the generation heat and import first kind of plastics into by second kind of plastics at place, two kinds of plastics part composition surfaces.At heat effect zone (welding region), plastics are just melted, and under pressure, the cooling back forms weld seam naturally, realizes the synchronous welding of two kinds of plastics.
The present invention also provides a kind of laser plastic microwelding device based on dynamic mask technique, be: comprise laser instrument 1, astigmatic system, LCDs 5, computer 6 and focusing system, wherein, astigmatic system, LCDs 5 and focusing system be provided with from top to bottom successively and the axle center on same center line; Computer 6 links to each other with LCDs 5.
Above-mentioned said astigmatic system is made up of the convex lens of two different focal, and it is near from laser instrument that the convex lens that focal length is little are placed on the top, and it is far away from laser instrument that the convex lens that focal length is big are placed on the below.Function needs according to design, distance in the astigmatism system between two convex lens equals both focal length sums, and the ratio of big focal length and little focal length is exactly the ratio that laser beam amplifies, keep the distance between two convex lens constant, can guarantee still to be collimated light beam after laser beam is by astigmatic system.Amplify the damaging thresholding that makes laser beam energy density be lower than LCDs through astigmatic system, make the display screen life-span prolong, do not have the characteristics of normal masks Stimulated Light ablation rapid wear.
Above-mentioned said focusing system is made up of convex lens and a slice concavees lens of two different focal, and three lens are followed successively by big focal length convex lens, little focal length convex lens, concavees lens from top to bottom.Function needs according to design, distance between three lens of focusing system is by the size decision of workpiece weld seam, regulate the distance between big focal length convex lens, little focal length convex lens and the concavees lens, guarantee that laser beam obtains the hot spot consistent with weld shape later on by focusing system.
When using the inventive method and device to weld, workpiece to be welded is placed under the focusing system, and the light transmission plastics part is last, and the light absorptive plastics part is following.Better method is, is coated with the last layer absorbent on light transmission plastics part and light absorptive plastics part composition surface, guarantees that laser beam can better be absorbed.
Among the present invention, the axle center of laser beam, astigmatic system, LCDs, focusing system is remained on same the center line, avoid laser beam in transmission course, to be offset, guarantee to obtain expecting and want the hot spot that forms.
Function needs according to design, computer is transferred to information on the LCDs by data wire, the counter-rotating enlarged image that is showing weld shape on the LCDs, be that the figure of position on LCDs that does not need on the workpiece to weld shows black, need the position demonstration of welding colourless, LCDs mainly plays the blocking effect to light beam.The image that difform weld seam only needs to show on the regulator solution crystal display screen gets final product, and has avoided repeating to make mask, and what simultaneously display screen showed is the amplification figure of weld seam, avoided the processing dimension too abortion gain interest and penetrate and make the ambiguous defective of weld seam.
The present invention is dissolved into the transmission micro-welding process of plastics with the liquid crystal dynamic mask technique, can adapt to the synchronous welding of difformity weld seam, has realized the low cost of micro element welding and in enormous quantities, and technology is simple, high conformity, and be suitable for automated production.
Description of drawings:
Fig. 1 is the laser plastic microwelding device schematic diagram based on dynamic mask technique that proposes according to the present invention.
1. laser instrument; 2. laser beam; 3 little focal length convex lens; 4. big focal length convex lens; 5. LCDs; 6. computer; 7. big focal length convex lens; 8. little focal length convex lens; 9. concavees lens; 10. light transmission plastics part; 11. composition surface; 12. light absorptive plastics part; 13. center line
The specific embodiment:
The present invention propose based on the laser plastic microwelding device of dynamic mask technique as shown in Figure 1.Form by laser instrument 1, astigmatic system, LCDs 5, computer 6, focusing system; The astigmatism system is made up of the convex lens of two different focal, and it is near from laser instrument 1 that the convex lens 3 that focal length is little are placed on the top, and it is far away from laser instrument 1 that the convex lens 4 that focal length is big are placed on the below; Under the astigmatism system is LCDs 5, and LCDs 5 is connected to computer 6 by data wire; Be focusing system under the LCDs 5, focusing system is made up of convex lens and a slice concavees lens of two different focal, and three lens are followed successively by big focal length convex lens 7, little focal length convex lens 8, concavees lens 9 from top to bottom.
With reference to Fig. 1, implementation process is specific as follows, is 300um with the diameter, and width is that the circular weld seam of 75 μ m is an example.
At first be the preparation of light transmission plastics part 10 and light absorptive plastics part 12, select two block length 25mm for use, wide 25mm, the Merlon of thick 1mm is a workpiece to be welded, 11 places, composition surface at two workpiece are coated with last layer clearweld absorbent, guarantee better to absorb laser beam 2.
In computer 6, utilize software to draw weld shape then, the weld shape of drawing is bigger 20 times than actual weld shape, and pattern file is transferred on the LCDs 5, the reverse image that is showing weld shape on the LCDs 5, the position that promptly needs to weld shows colourless, the position that does not need to weld shows black, and colourless position laser beam 2 can see through, and the position laser beam 2 of black is blocked.
According to the weld shape that shows on the LCDs 5, and the multiple of astigmatic system expansion bundle, the laser facula size that laser instrument 1 produces regulated.The expansion bundle multiple of astigmatism system, by little focal length convex lens 3 and 4 decisions of big focal length convex lens, expanding bundle multiple 10 with astigmatic system is example, the laser facula size of regulating laser instrument 1 is 1mm.
By 2 spot sizes of the laser beam behind the LCDs 5 20 times of actual welds size, need to come the scaled down spot size by focusing system for this reason, by regulating the distance between big focal length convex lens 7, little focal length convex lens 8 and the concavees lens 9, make laser beam 2 by obtaining the hot spot with the actual welds consistent size after the focusing system.
Carry out the laser plastic microwelding at last, utilize the light spot shape laser irradiation light transmission plastics part 10 consistent and the composition surface 11 of light absorptive plastics part 12 with actual welds.Form the heat effect district, plastics in heat effect district (being composition surface 11) are melted, the big molecule of plastics under the hot melt state is diffusion mutually under the effect of welding pressure, produce Van der Waals force, thereby link together closely, the material that has melted so forms joint, is welded parts promptly to be connected.
In sum, a kind of laser plastic micro-welding method and device involved in the present invention based on dynamic mask technique, the liquid crystal dynamic mask technique is dissolved into the transmission micro-welding process of plastics, can adapt to the synchronous welding of difformity weld seam, the low cost that has realized the micro element welding is with in enormous quantities, technology is simple, high conformity, and be suitable for automated production.
Claims (8)
1, a kind of laser plastic micro-welding method based on dynamic mask technique, it is characterized in that, the laser beam that laser instrument sends, after astigmatic system, form large diameter collimated light beam, and shine on the LCDs, laser beam is by behind the LCDs, form the hollow out figure hot spot that becomes inverse relation with the liquid crystal display screen image, the convergence formation hollow out hot spot consistent through focusing system with weld shape, see through first kind of plastics, after acting on place, two kinds of plastics part composition surfaces, the cooling back forms weld seam naturally.
2, as the said laser plastic micro-welding method of claim 1 based on dynamic mask technique, it is characterized in that, LCDs shows the weld shape information that the computer transmission comes, the position of not welding shows black on LCDs, need the position demonstration of welding colourless, LCDs is to the laser beam selective permeation.
3, a kind of device of implementing the described a kind of laser plastic micro-welding method based on dynamic mask technique of claim 1, it is characterized in that, comprise laser instrument 1, astigmatic system, LCDs 5, computer 6 and focusing system, wherein, astigmatic system, LCDs 5 and focusing system be provided with from top to bottom successively and the axle center on same center line; Computer 6 links to each other with LCDs 5.
As the said device of claim 3, it is characterized in that 4, said astigmatic system is made up of the convex lens of two different focal, the convex lens that focal length is little (3) are placed on the top, and the convex lens that focal length is big (4) are placed on the below.
5, device as claimed in claim 4 is characterized in that, the distance between the medium and small focal length convex lens of astigmatic system (3), the big focal length convex lens (4) equals both focal length sums, and big focal length is the expansion bundle multiple of astigmatic system with the ratio of little focal length.
6, as the said device of claim 3, it is characterized in that, said focusing system is made up of convex lens and a slice concavees lens of two different focal, and three lens are followed successively by big focal length convex lens (7), little focal length convex lens (8), concavees lens (9) from top to bottom.
7, device as claimed in claim 6, it is characterized in that, distance in the focusing system between big focal length convex lens (7), little focal length convex lens (8), the concavees lens (9) is determined by weld size, guarantees that laser beam (2) obtains the hot spot consistent with weld shape later on by focusing system.
8, as the said device of claim 3, it is characterized in that, LCDs (5) shows the weld shape information that computer (6) transmission is come, demonstration black is gone up at LCDs (5) in the position that does not need to weld, need the position demonstration of welding colourless, LCDs (5) is to laser beam (2) selective permeation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101226090A CN101323172A (en) | 2008-06-03 | 2008-06-03 | Laser plastic micro-welding method and device based on dynamic mask technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101226090A CN101323172A (en) | 2008-06-03 | 2008-06-03 | Laser plastic micro-welding method and device based on dynamic mask technique |
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| CN101323172A true CN101323172A (en) | 2008-12-17 |
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| CNA2008101226090A Pending CN101323172A (en) | 2008-06-03 | 2008-06-03 | Laser plastic micro-welding method and device based on dynamic mask technique |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966548A (en) * | 2014-05-07 | 2014-08-06 | 京东方科技集团股份有限公司 | Mask plate, manufacturing method of mask plate and mask assembly with mask plate |
| CN111069779A (en) * | 2019-12-06 | 2020-04-28 | 江苏大学 | Device and method for forming super-hydrophobic micro-part through laser shock |
| CN113399829A (en) * | 2021-07-09 | 2021-09-17 | 东莞市中麒光电技术有限公司 | Welding device and welding method using same |
-
2008
- 2008-06-03 CN CNA2008101226090A patent/CN101323172A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966548A (en) * | 2014-05-07 | 2014-08-06 | 京东方科技集团股份有限公司 | Mask plate, manufacturing method of mask plate and mask assembly with mask plate |
| CN103966548B (en) * | 2014-05-07 | 2015-07-01 | 京东方科技集团股份有限公司 | Mask plate, manufacturing method of mask plate and mask assembly with mask plate |
| CN111069779A (en) * | 2019-12-06 | 2020-04-28 | 江苏大学 | Device and method for forming super-hydrophobic micro-part through laser shock |
| CN113399829A (en) * | 2021-07-09 | 2021-09-17 | 东莞市中麒光电技术有限公司 | Welding device and welding method using same |
| WO2023279810A1 (en) * | 2021-07-09 | 2023-01-12 | 东莞市中麒光电技术有限公司 | Welding apparatus and welding method using same |
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Open date: 20081217 |